Through Penetration Firestop Device
Cleaner & Safer for Floors & Walls
What's special about this firestop device from Abesco?
- Red color finish, 22 gauge steel, 10 inch length
- Designed to allow cables to penetrate fire-rated floors and wall
- Four different size widths to choose from: 2" round (50.8mm), 2.5" square (65mm), 4" square (102mm), 4" diameter round (102mm)
- Suitable for use in concrete floors and walls, drywall, and wooden floors
- Easy to install fire seal with no requirement to cut any material.
- Click for More Features

The Cable Transit firestop is suitable for common types of construction including concrete floors and walls, gypsum drywall assemblies, and rated wooden floor constructions.
2.5" Square | |||
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Part # | Dimensions | Description | Price |
FP-CT31974 | 2.5" x 5" | DUPLEX Mounting Flange Set (2 pc. set for quantity (2) part # FP-CT31940) Used to mount two (2.5) inch CT120 units together side by side | Manufacturer Direct |
FP-CT31976 | 2.5" x 7.5" | TRIPLEX Mounting Flange Set (2 pc. set for quantity (3) part # FP-CT31940) Used to mount three (2.5) inch CT120 units together side by side | Manufacturer Direct |
4" Square | |||
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Part # | Dimensions | Description | Price |
FP-CT31942 | 4" x 4" square x 10" length | Cable Transit Firestop Device CT 120 - 4" square | Manufacturer Direct |
FP-CT31982 | 4" square | SINGLE Mounting Flange Set (2 pc. set for single part # FP-CT31942) Used to mount one 4inch CT120 unit | Quick Ship |
FP-CT31988 | 8" x 12" | SIXPLEX Mounting Flange Set (2 pc. set for quantity (6) part # FP-CT31942) Used to mount six (4) inch CT120 units together side by side | Manufacturer Direct |
2" Diameter | |||
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Part # | Dimensions | Description | Price |
FP-CT31938 | 2" diameter x 10" length | Cable Transit Firestop Device CT 120 - 2" diameter | Quick Ship |
FP-CT31968 | 2" diameter round | CT 120 Mounting Flange Set 2 pc. Set for single part # FP-CT31938 | Manufacturer Direct |
4" Diameter | |||
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Part # | Dimensions | Description | Price |
FP-CT31950 | 4" diameter x 10" length | Cable Transit Firestop Device CT 120 - 4" diameter | Manufacturer Direct |
FP-CT31998 | 4" diameter round | CT 120 CT Mounting Flange Set (2 pc. set for single part # FP-CT31950) | Quick Ship |
Don't Forget Caulking
![]() From Abesco CP310 FR Acrylic Intumescent Caulk is designed to seal and prevent the spread of fire from one compartment to another wherever cables, wires, or other services pass thru firewalls and/or floors, or wherever there is a gap between elements in fire rated walls or floors. |
- May be joined together to form double or triple units using CT Mounting Flange Set (purchase separately)
- Underwriters Laboratory UL Classified 1 and 2 hour rating
- Tested in accordance with ASTM E814, UL1479, BS EN1366-3, BS 476 part 20, AS/NZ 1530
- Easy installation saves labor cost
- Cable Capacity Chart (PDF)
- The Cable Transit firestop consist of a square steel sleeve with heat reactive graphite based intumescent material
- If exposed to high temperatures of 300° F, the intumescent material will rapidly expand to form a solid insulating char plug to seal and prevent the passage of fire or smoke
- Underwriters Laboratory UL Classified 1 and 2 hour rating
- Tested in accordance with ASTM E814, UL1479, BS EN1366-3, BS 476 part 20, AS/NZ 1530
RELATED ARTICLES -
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You can also call us toll free 866-222-0030
Questions & Answers
how many cat6 cables will fit into the 4inch round?
- Hello, In the middle of the page is a series of tabs, if you click on the SPECIFICATIONS tab you will be able to see the PDF file Cable Capacity Chart this will tell you the capacity of all the Cable Transits/Pass through. You would need to measure the diameter of the cables you would like to add however, the 4" pass through can fit 1,155 cables @.118" in diameter
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